Cylinder hone or lapping tool



March 16 1926.

T. RESTEL CYLINDER HONE OR LAPPING TOOL Filed March 1, 1924 2 Sheets-Sheet l A TTORNE Y.

March 16-,-192.6. 1,576,788

T. REsTEL CYLINDER HONE OR LAPPING TQOL n Filed March 1, 1924 z sheets-sheet 2 7- INVLNTOR.'

ATTORNEY.v

Patented Mar. 16, A1926.

4THEODORE BESTEL, 0F CLEVELAND, OHIO.

(PYLINDEB HONE 0R LAPPING TOOL.

Application led Iarch 1, 1924. Serial No. 696,206.

To all whom it may concern:

Be it known that I, THE'oDonn BESTEL, a citizen of the United States, residing at Cleveland, in the county oi. Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Cylinder Hones or Lapping Tools, of which the following is a specification.

This invention relates to improvements in cylinder hones or lapping tools, in which are arranged sets of radially adjustable honing stones, and the primary object is to provide a novel and compactly constructed means :for accurately adjusting these stones.

Another object is to provide a hone of this type in which the pressure .of the honing stones upon the faces being honed may be readily varied. A

A further object is to provide means nor mally contracting the honing stones to permit insertion intoa cylinder or the like and operable manually to expand or contract the honing stones ory automatically to expand the stones into contact with the cylinder faces upon complete insertion of the tool into the cylinder.

It is likewise an object to provide a uni* versal joint connection upon the tool so as to insure true and unvarying degrees of honing throughout the length of the cylinder.

OtherI objects will be in part obvious and in part pointed out hereinafter.

In order'that the invention and its mode of operation may be readily understoodby persons skilled in the art, I have in the accompanying illustrative drawings and in the following detailed description based thereon set out one possible embodiment of the same.

In these drawings ,Y j

Fig. 1. is a side elevation of the honing tool with the automatic expansion contro] lever shown in its two positions;

Fig. 2. is a sectional view taken substantially on the line 2 2 of Figure 1;

Fig. 3. is a side elevation showing the hone expanding member; Y

Fig. 4. is a plan view of one of the stone carrying-shoes;

Fig. 5. is a sectional view taken substantially on the line 5 5 of4 Figure 2;

, Fig. 6. is a4 sectional view ltaken substantially on the line 6 6 of Figure 2;

improved honing tool may be broadly stated as comprising a sleeve or stock 10, said stock being provided near its ends with slots 11 circumferentially spaced and varying in number dependent upon the number of honing stones lto be employed. This sleeve or stock 10 mounts radially adjustable shoes 12, which include elongated arcuate channel l members or body portions 13 adapted to carry stones or other abrasive elements. To the ends of the channel members 13 are secured by rivets or if desired integrally formed, heads having central ribs 14 which extend through the slots 11 in the sleeve or stock 10 and thereby retainu the members in proper relative position and guide the stones in their radial movement. The outer corner- 15 of each head is bevelled for contact with retaining rings and the inner faces are bevelled as at 16 for contact with expanding members or cones.

ln the formation of the expanding members, I employ a cylinder or sleeve 17 having one end closed and an axially extended neck 18 formed integral with the closed end and connected to the small end or apex of an expanding member or cone 19. The neck 18 between the cone and sleeve permits of necessary contraction of the stones. This cone 19 terminates in a circular head which is reduced to form an annular shoulder `20, the function of which is apparent. A transverse opening is formed adjacent the end Aof the reduced portion and communicates with an axial socket in which is disposed a spring pressed plunger or stop member 21 whose function is to retain a transverse bolt 22 in a certain position through being seated in a notch or recess formed in the bolt as shown in Figure 2. The sleeve, 17 Iis provided near its closed end with a pair of diametrically oppositely disposed slots 23 which extend longitudinally of the sleeve andy in which Y a transverse pin or bolt 23 is arranged, this pin being rigidly secured in opposed walls of the stock or main sleeve 10 and serving as a guide for the sleeve. This pin is also adapted to contact with one end of a coil expansion spring 24, the other end of which bears against a head 2`5. This head 25 is adjustable axially by means of a screw 26 threaded into a central bore formed in the y collars 29 and 30, the collar 29 having a f forme radially inwardly extending iange whereby to increase the bearing sur ace for the ends of the heads. 'As shown, an internally threaded ring 31 is screwed upon the collar 29 and is bevelled to engage the outer bevels 15 of the heads of the shoes 12. A circumferential groove around the ring 31 seats a spring 32 whose function is to seat a plunger 33 in any of the spaced grooves 34 formed in the collar 29 so as to retard movement as between these two members after they have been adjusted. Obviously movement of the collars 31 toward or away from each other decreases or increases the degree of contrae' tion or expansion of the stones which is clearly due to axial movement of the expanding cones under influence of the spring whose tension as stated is readily variable. The collar 29 is internally threaded for the reception of a centering plug employed to center the hone for finishing olf the stones in the manufacturing process.

At the other end of the tool a reduced externall threaded sleeve portion 35 is to provide an internal shoulder which abuts the first named shoulder 20 of the cone 19. Diametrically .oppositely disposed slots 36 are formed 1n the reducedv portion 35 and through these slots the opposite ends of the bolt 22 extend for mounting a substantially ULshaped cam lever 37 whose function will be set forth.

A substantially spherical head 38 is formed upon the end of said reduced portion 35 and is held in a socket provided at one end of a two-part universal jointA connection 39. The other end of the connection is similarly socketed to receive a head of a driving or power shaft. This double universal joint connection insures accurate and unvarying degrees of honing throughout the len th of a cylinder being honed.

he heretofore mentioned cam lever 37 is carried by the bolt 22 and'is provided with opposed cani faces 40 which bear upon an internally threaded ring or collar 41. This ring or collar is adjustable on the reduced portion 35 of the externally threaded collar 39 so as to provide for proper operation of said -cam lever which as stated is adapted to hold the stones in contracted position when the cams bear against the collar and to automatically trip and allow the stones to expand when the end 42 of the cam lever strikes the end of a cylinder. It is apparent that in the first named position, the expand* ing members or cones are drawn upwardly and slightly away from the heads carried by the shoes and thereby permit contraction of the stones so the tool may be inserted into the cylinder. This results in compression'of the s ring and upon inserting the tool with a cy inder the end 42 of the cam lever is struck and raises, consequently allowing the spring to force the 'cones against the shoes. The stones snugly contact with the cylinder faces and operation may be started. .It is understood that adjustment of the collar 41 allows use of the automatic cam lever regardless of the size of the cylinder being honed.

Manifestly the construction shown is capable of considerable modification and such modification as ,may fall within the sco e of my claims, I consider within my invention.

I claim:

1. A cylinder hone comprising a slotted stock, a pair of longitudinally alined expandlng members, a slotted sleeve connectmg sai members, a transverse pin carried by the stock and extending through the slotted sleeve, a coil spring arranged within the sleeve between said pin and one end of the sleeve, a s et of radially adjustable stone carrying shoes mounted upon the stock, and portions carried by the shoes to engage the expanding members and adjust the stones upon axial movement of the members.

2. A cylinder hone comprising a slotted stock, a pair of longitudinally alined .expanding members, a slotted sleeve connectingv sai members, a transverse pin carried by the stock` and extending through the slotted sleeve, a coil spring arranged within the sleeve between said pin and one end of the sleeve, means for varying the tension of said spring, a set of radially adjustable stone carrying shoes mounted upon the stock, and portions carried by the shoes to engage the expanding members and adjust the stones upon axial movement of said members.

3. A cylinder hone comprising a slotted stock, a pair of longitudinally alined interconnected expanding members, a set of stone carrying shoes radially adjustable upon the slotted stock with axial movement of the the spirit rvof expanding members, spring means arranged between the expanding members to move them in the same direction, adjustable collars arranged adjacent the ends of the slot- ,ted stock, and bevelled head ortions carried by the shoes and engagea le with the adjustable collars to vary the expansion limit of said shoes.

4. A cylinder hone comprising a slotted stock, radially adjustable stone carrying shoes on the stock, a pair of longitudinally alined inter-connected expanding oones engaging said shoes, a coil spring arranged between the. cones to exert pressure to relatively axially shift the stock and cones to expand the shoes, and a cam lever arranged to retain the shoes in. contracted relation-for insertion intoA a cylinder, said lever bein actuated by engagement with a portion o the cylinder to permit expansion of the shoes.

5. A cylinder hone includingL radially adjustable stones, axially movable cones foi expanding the stones, spring means for actuating the cones, and a cam lever arranged to axially move the cones to tension the spring and slightly contract the stones, said lever being adapted to be tripped by engag ing a portion of a cylinder to be honed, whereby the spring is permitted to act and expand the stones.

In testimony whereof, vI aiiix my signa.-

ture.

THEODORE BESTEL. 

